Ricky,
After you create a Traverse, you can use the Create polygon tool from that Traverse.
Open the Construct Polygons
You can select the traverse (that closes) using the Select Tool.
Select the layer you want the feature in.
Click construct Polygon at the bottom of the tool pane, and viola! you have a new polygon in that layer.
See the link below for more information.
http://pro.arcgis.com/en/pro-app/help/editing/construct-polygons-from-features.htm